Hot Water Issue

kmoyer26

We have recently installed a outside hot water boiler.  We brought the lines in and have three zones off of them.  The bottom zone goes around the main floor the top zone is to the upstairs.  We have the old cast iron radiators in the upstairs and baseboard in the down stairs.  Down stairs works perfectly fine all the time.  The second floor is where the problem occurs.  We can get them to fill up when the cirrculator is running and then when the thermostat kicks the cirrucrulator off the water back drains out of the radiators.  We piped them so the each room can be turned down at the radiator.  The way we did this was to run a main line in the ceiling of the first floor and we T'd off to the in and out on each radiator.  The in and out are both on the bottom of the radiators.  Any ideas on how to fix the water leaving the radiators and going back through the cirrculator and out to the stove would be greatly appraited.

Ironman

More Info Needed

Is the wood boiler pressurized?



If not, did you isolate the house loop from the boiler with a heat exchanger? Is the house loop pressurized?



Can you post a diagram or pics of the system?

kcopp

I bet that....

the outdoor boiler is not a pressure vessel... They need a heat exchanger to make the inside pressurized.... and all the fixings to go w/ it. (extrol tank. separate fill. separate circulator.....)

NRT_Rob

and that

is exactly what we would recommend.



multiple story unpressurized systems are no fun.